Running on Ubuntu 24.04.4 LTS
TEST 1 - trailing colon syntax ignored
touch ownergroup_test
ls -l ownergroup_test
-rw-r--r-- 1 root root 0 Jul 22 15:09 ownergroup_test
chown perforce: ownergroup_test
ls -l ownergroup_test
-rw-r--r-- 1 perforce perforce 0 Jul 22 15:09 ownergroup_test
The owner/group after 'chown perforce: ownergroup_test' should be perforce:perforce.
PASS TEST 1: Ownership is correct.
TEST 2 - chown -h fails for symlink to directory
mkdir dir1
ln -s dir1 symlink_to_dir1
ls -ld dir1 symlink_to_dir1
drwxr-xr-x 2 root root 4096 Jul 22 15:09 dir1
lrwxrwxrwx 1 root root    4 Jul 22 15:09 symlink_to_dir1 -> dir1
chown -h perforce symlink_to_dir1
ls -ld dir1 symlink_to_dir1
drwxr-xr-x 2 root     root 4096 Jul 22 15:09 dir1
lrwxrwxrwx 1 perforce root    4 Jul 22 15:09 symlink_to_dir1 -> dir1
The owner of the symlink and dir after 'chown -h symlink_to_dir1' should be perforce (symlink) and root (dir), respectively.
PASS TEST 2: Link and Dir Ownership is correct.